Oil lubricating can



March 1, 1932. H. KREIDEL 1,847,188

OIL LUBRICATING CAN Filed June '7, 1929 a Fig=2 Fig-4 g o 1 h A Ms Aks IDEA BY Patented Mar. 1, 1932 UNlTEfi STATES HANS KREIDEL, OF WIESBADEN, GERMANY OIL LUBRICATING CAN Application filed June 7, 1929, Serial No. 369,163, and in Germany March 22, 1929.

The present invention relates to an oil lubricating can having a cylindrical supply container and a hand actuated ejection piston located in the latter. The piston is adapted to be moved only forwards in the direction for ejection and remains in the position into which it has been moved until the next operation. The forward movement and the retaining of the piston in the position into which it has been moved is effected by a clutch which, according as to whether the piston is mounted rigidly or loosely on its piston rod, is provided on the operating lever for the piston rod or may be provided in the piston itself. This clutch may be released by a suitable pulling device and then enables the piston to be easily drawn back or withdrawn which is for example necessary when the supply container is to be refilled with lubricating oil. The forward movement of the ejecting piston and thus the ejection of the necessary or desired quantity of lubricating oil may be conveniently adjusted and accurately limited so that each 0 point to be lubricated will receive the quantity of oil which it is considered is required. As the ejection of the lubricating oil is effected under pressure it is possible with the oil lubricating can, according to the invention, also to operate from the bottom upwardly, therefore the lubricant can be supplied from a lower point to a point to be lubricated located at a higher level. The outflow is entirely valveless and it is therefore possible to effect the filling of the can through the outflow. After removal of the ejecting piston the cylindrical supply container wit-h the filling pipe and the outflow nozzle form smooth parts which are internally free from any obstructions and are not provided with any valves or other devices. They can therefore be constructed in a simple and economical mannerby drawing from suitable material. In the form of construction wherein the ejecting piston is movable on the piston rod the return movement of the piston rod af er each forward movement of the piston produces a slight r suction action by which, after each operation, any drops of oil which may remain clinging to the nozzle are sucked back and cannot fall off or solidify.

By means of the oil lubricating can according to the invention it is possible to effect a simple and clean lubrication of the points to be lubricated of the most variable character, the lubricant is always discharged in accurate and adjustable quantities and the can can be manipulated easily, can be used in all positions, and can be manufactured economically without any difIicult-ies.

In the accompanying drawings is illustrated by way of example one form of construction in which the ejecting piston, having a clutch mounted therein, is moved gradually and in strokes up to the end of its movement on a piston rod, which returns into its original position after each operation, the piston being subsequently capable, aft-er releasing the clutch, of being drawn back for refilling the supply container.

Figure l isan elevation of the oil lubricating can, a portion of the supply container and the ejecting piston with the clutch in the latter being shown in longitudinal section, and

Figure 2 shows the clutch of the ejecting piston in the disengaged position.

In the various figures (1 indicates the cylindrical lubricating oil supply container of which the end is provided with a filling and discharge pipe 6 to the free end of which there is connected by a screwed sleeve 0 the bent ejecting nozzle d. The supply contain'er is also provided with a cover '6 on which is provided a handle f. The piston rod 9 is guided in the cover of the supply container and extends up to the pipe 6. The end 7 g of the piston rod 9 extending beyond the cover 6 is provided with an enlarged head and between the cover and this enlarged head is arranged a return spring h. At 8' there is rotatably mounted in the handle 7, which at this point is forked, an operating bell crank lever of which one arm k bears against the enlarged end 9 of the piston rod whilst the other arm k extends parallel with the supply 1 container and at its free end is provided with ahook shaped portion so as to facilitate engagement by the finger of a hand. A plnl holds the lever arm of the operating lever always in engagement with the enlarged end 9 of the piston rod and thus limits the return movement of the piston rod under the action of the spring h.

The rocking movement of the lever arm 76 of the actuating lever and the movement of the piston rod are limited by a set screw m provided in a transverse bar of the handle This screw is provided with a scale cooperating with a fixed pointer a so that the movement of the operating lever can be so adjust-ed that its movement corresponds with a predetermined amount of lubricant to be discharged. 0 is the hub of the cup shaped ejecting piston. fitted on the piston rod 9. To the hub 0 is secured bell shaped guide meinbe 0 and to the bottom of this there is secured, by means of a number of bolts 0 distributed around the periphery thereof, the cup leather 0 A sprin y spreading sleeve 0 serves always to press the free edge of the cup leather 0 against the inner wall of the cylindrical supply container 0. The securing of the cup leather and its spreading sleeve is effected by the same bolts 0 but independently of one another, as the securing rim of the cup leather is engaged between the annular bottom of the guide member 0 and a separate clamping ring against which press tightening sleeves which are fitted loosely over the bolts 0 and extend up to the nuts or washers on the bolts. The bottom of the spreading sleeve 0 is provided with apertures by means of which it is fitted loosely on the tightening sleeves of the bolts 0 Be tween the bottom of the spreading sleeve 0 and the nuts or washers on the bolts 0 are provided springs 0 coiled around the bolts and applying a spring pressure to the spreading sleeve 0 in such a manner that the latter can move freely and independently on the tight ening sleeves on the cup leather.

The clutch consists of two clutch limbs p arranged opposite to one another and hinged to the hub 0, these limbs extending downwardly into the bell shaped guide member 0 of the ejecting piston and there are somewhat spread apart. he rearward ends of the members are connected together by two transverse bars 2" which pass freely around the piston rod 9. Onto the members ya there is loosely fitted between their hinged points and the transverse bars 1" a separate bearing member sin which are mounted two clamping rollers 25 between which the piston rod 9 passes. These clamping rollers are adapted to wedge between the piston and the oppositely disposed inner surfaces of the clamping limbs 79. The bearing member 8 consists of two bars between which pass the piston rod and the clamping limbs. he bearing member s is thus capable of moving forwardly and rearwardly. A springa wound around the piston rod 9 and located between the transverse bars 1 and the bearing member 8 tends constantly to hold the bearing member in such a position that the clamping rollers are in their clamping position, that is to say to drive the clamping rollers into the wedge shaped spaces between the piston rod and the clamping limbs. To the bearing member s is attached a pulling device 1) (wire, rope, chain or the like) which passes outwardly through an opening in the cover 6. The device serves when necessary, for example when it is desired to refill the supply container, to draw the bearing member with the clamping rollers against the action of the spring u so that clamping action between the rollers and the piston rod is destroyed and the ejection piston can be drawn back on the piston rod into its original position. The grooves of the clamping rollers are preterably made to suit the cross section of the piston rod and the inner surfaces of the clamping limbs.

ld hen the supply container is full the ejecting piston bears directly upon the surface of the lubricating oil. If lubricant is to be applied to a point to be lubricated the lever arm k of the actuating lever is drawn by a finger away from the wall of the container and thus the other lever arm 70 is pressed against the enlarged head 9 of the piston rod g. The piston rod 9 is thus moved through a corresponding distance and moves with it the ejecting piston which is clamped thereto by the clutch. The ejected quantity of oil is thus discharged through the curved nozzle d. When the actuating handle or lever k is thereupon released the spring 7L returns the piston rod 9 into the initial position. At the same time the actuating lever is also returned into its initial position.

During the return movement of the piston rod, due to the action of the return spring 7L, the ejecting piston is disengaged from the piston rod and remains in its advanced position until it is again actuated for further forward movement. The ejecting piston is thus gradually moved forwards on its piston rod until the supply container has been completely emptied. By reason of the return movement of the piston rod after each forward movement of the piston there is produced a slight suction action which causes any lubricating oil remaining in the nozzle (Z to be drawn in so that it is not possible for drops of oil to remain clinging to the nozzle.

If the supply container, after being con pletely emptied is to be refilled, then by pulling the pulling device '0 the bearing member 8 together with the clamping rollers If is drawn out of the clamping position thus disengaging the ejecting piston and allowing this tobe drawn back on the piston rod to the cover 6 of the supply container. The filling of the lubricating can is then effected through t 1e pipe 6 after removal of the nozzle d. By

ill

suitably adjusting the set screw m relatively to the pointer n it is possibleto accurately predetermine the amount of lubricant to be ejected. 7

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. An oil lubricating can having a cylindrical supply container, an ejecting piston located therein, a guiding hub in said piston, a piston rod projecting at one end beyond the container and extending through said guiding hub in said piston, a clutch mounted on said ejecting piston, said clutch comprising a clutch device converging in the direction of the ejection movement of the piston, rotatable clamping bodies arranged between he clutch device and the piston rod, a spring actuated bearing member carrying said clamping bodies and movable on said piston rod, operating means for exerting pressure upon the projecting end of said piston rod, and a pulling device whereby said clutch is released and said piston is operated in a return direction to an initial position.

2. An oil lubricating can having a cylindrical supply container, an ejecting piston located therein, a guiding hub in said piston, a piston rod projecting at one end beyond the container and ex ending through said guiding hub in said piston, a clutch mounted on said ejecting piston comprising oppositely disposed clamping members pivoted to the guiding hub and inclined upwardly and inwardly, bars connecting said clamping members at their free ends, clampin rollers disposed between the clamping members and the piston rod, a separate member carrying said clamping rollers, a spring located between said separate member and said connecting bars whereby said clamping rollers are normally maintained in clamping position between said clamping members and the piston rod, means for exerting pressure upon the projecting end of said piston rod to operate the same, and a withdrawing device connect-ed with the separate member of said clutch whereby the latter is operated at will to adjust said clamping rollers to an inoperative position and said piston to an initial position.

8. An oil lubricating can comprising a cylindrical supply container, an ejecting piston located therein, a piston rod projecting therefrom at one end and extending through the piston, a clutch mounted on said piston, operating means for exerting pressure in one direction upon the projecting end of said piston rod comprising a bell crank lever, one arm of which engages the projecting end of said piston rod and the other arm of which extends lengthwise of the container in external relation thereto, means for arresting the operation of said bell crank leverat a predetermined point, and a piston returning means operable between the piston and the piston rod whereby an independent return 4;. An oillubricating can comprising a cylindrical supply container, an 818Ct11'1gP1S- ton located therein, a piston rod pro ecting at one end beyond the container and extending through said piston, clutch means connecting sa1d plston and sa1d piston rod, a bell crank lever for actuating said piston rod,

onearm of which engages the projecting end of said piston rod and the other arm of which extends lengthwise of the container in external relation thereto, a set screw adj ustably mounted in the path of said operating means, a scale on sa1d set screw, and a pointer cooperating with said scale to wasibly indicate the setting of said screw whereby the stroke of said operating means may be determined.

5. An oil lubricating can having acylindrical supply container and an ejecting piston located therein, a piston rod having one end projecting beyond the container and eX- tending through said piston, a clutch mounted on said piston, operating means for eX- erting pressure upon the projecting end of said piston rod to operate the same in one direction, and a spring acting upon said rod to drive said piston upon movement of said rod in one direction, said piston having a guiding hub in slidable engagement with said piston rod; said clutch comprising a guide having walls converging in the direction of the movement of the piston upon its discharge stroke, rotatable clamping elements arranged between said walls and said piston rod, and a spring actuated bearing member carrying said clamping elements and movably mounted on said piston rod; and man ually operable means for releasing said clutch to permit return of said piston to its initial position.

6. An oil lubricating can having a cylindrical supply container and an ejecting piston located therein, a piston rod having one end projecting beyond the container and extending through said piston, a clutch mounted on said piston, operating means for exerting pressure upon the projecting end of said piston rod to operate the same in one direction, and a spring acting upon said rod to drive said piston upon movement of said rod in one direction, said piston having a guiding hub in slidable engagement with said piston rod; said clutch comprising a guide having walls converging in the direction of the movement of the piston upon its discharge stroke, rotatable clamping elements arranged between said walls and said piston rod, and a spring actuated bearing member carrying said clamping elements and movably mounted on said piston rod; said operating means comprising a bell crank lever, one arm of which engages the projectmg end of said piston rod and the other arm of which extends along the outside of the container, and in which means are provided for limiting the extent of movement of the bell crank lever.

7. An oil lubricating can having a cylindrical supply container and an ejecting piston located therein, a piston rod having one end projecting beyond the container and extending through said piston, a. clutch mounted 011 said piston, operating means for exerting pressure upon the projecting end of said piston rod to operate the same in one direction, and a spring acting upon said rod to drive said piston upon movement of said rod in one direction, said piston having a guiding hub in slidable engagement with said piston rod; said clutch comprising a guide having walls converging in the direction of the movement of the piston upon its discharge stroke, rotatable clamping elements arranged between said walls and said piston rod, and a spring actuated bearing member carrying said clamping elements and movably mounted on said piston rod; said operating means comprising a bell crank lever, one arm of which engages the projecting end of said piston rod and the other arm of which extends along the outside of the container; and means for arresting the movement of said bell crank in a predetermined position comprising a set screw provided with an indicating scale, a pointer cooperating with said scale to indicate the setting of said screw whereby the quantity of oil to be ejected upon each stroke may be accurately predetermined.

In testimony whereof I afiiXed my signature. c

- HANS KREIDEL. 

